CONCEPTUAL 🤔
Why does a car tire’s pressure increase when driven for a long time?
Friction between the tires and the road generates heat, increasing the temperature of the air inside, which in turn increases pressure.
An F1 team fills a car's tires at 22°C with an initial pressure of 210 kPa before the race. After several laps, the tires reach a temperature of 90°C due to friction. What will be the new pressure inside the tires, assuming the volume remains constant?
258.4 kPa
Explain why a sealed aerosol can might explode when heated.
When heated, the gas inside the can increases in pressure due to Gay-Lussac’s Law. If the pressure exceeds the can’s capacity, it will explode.
A gas in a fixed container has an initial temperature of 127°C and pressure of 500 kPa. What will be the pressure if the temperature drops to -73°C?
250 kPa
A balloon is filled with gas at 1 atm and 300 K. It is then heated to 600 K. What is the final pressure?
A) 2 atm
B) 1 atm
C) 0.5 atm
D) Cannot be determined
The balloon is not a rigid container, its volume would increase instead of pressure increasing.
Correct answer is therefore D) Cannot be determined because volume is not constant (violating the conditions of Gay-Lussac’s Law).
A laboratory experiment measures the pressure of a gas in a fixed container from 1.5 atm at 20°C to an unknown pressure at 500 K. If an experimental error caused the temperature reading to be 10 K lower than the actual value, what would be the difference between experimental and true pressure?
2.61 atm - 2.56 atm = 0.05 atm